Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e02729b1bd00af…

MALICIOUS

PDF

37.7 KB Created: 2020-11-05 01:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14c9c906f964e0d6f7d9b993c1a6e739 SHA-1: 95fd121e692c8cb552cccfcc9a699d64a76617a2 SHA-256: 55e02729b1bd00afbc9d97088daf4de46e224718c40d51881a94c2a6d36e36c1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=larry+butler+realty+hardinsburg+ky In PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/dexewobafux.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/fozuxojuvovinito.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/zufemegirerovoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f8e7db91d675.pdfIn PDF document text
    • https://nakotibuvifotog.weebly.com/uploads/1/3/4/6/134619478/1107651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6091bf9b-cbef-445c-a256-fda1c430f72e/consulado_mexicano_ny_citas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07be7aec-fc6e-49b4-9402-431f7b0c0301/rebujemarobun.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/96352737746.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/pipiwedutuwiwuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af0021d-6637-45c9-8714-1f225cc42bf5/88766734609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0575fd8d-de84-4cf9-a885-823f117bde50/62352636474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc95738-c24e-4ed0-8382-671cbfb9abcd/chrissy_teigen_cravings_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094ec958-6541-42dc-8bb8-94e778db2b2b/zelatuxulemuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e8dcaa-d413-4475-b865-41f6add93572/90241128348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06067675-be7a-4409-b4c3-4a48d013d051/xelip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46EA 5108 bytes
SHA-256: efabe06ea7250f55ded12e73d36f6518ac7957c08d0c4a57d2c5d26dd8325693
font_01_sfnt_off00005840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5840 10396 bytes
SHA-256: 55fdf46a82e6c7e6df39dd1ae579d3fe201bfcba6acc994b24974350f21e5a9f
font_02_sfnt_off00007bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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